GPT-5.6 Luna (Medium) vs Granite 4.2 30B
Which is better for the money: GPT-5.6 Luna (Medium) by OpenAI or Granite 4.2 30B by IBM? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-26.
Clear winner
Verdict
Pick GPT-5.6 Luna (Medium)
Granite 4.2 30B vs GPT-5.6 Luna (Medium): 49.2% less intelligence, 150.1% more cost to run the AA benchmark, and 852.9% slower end-to-end.
| Metric | GPT-5.6 Luna (Medium) | Granite 4.2 30B | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 25.0 | 12.7 | −49.2% Granite 4.2 30B is 49.2% less intelligent |
| Total AA cost (lower is better) | $44.32 | $110.83 | +150.1% Granite 4.2 30B is 2.5× more expensive |
| End-to-end time (lower is better) | 6.43s | 61.27s | +852.9% Granite 4.2 30B is 852.9% slower |
| Price per 1M tokens (in / out) | $0.20 / $1.20 | $0.16 / $0.65 | |
| Input modalities | Text, Image | Text |
Today's Pareto frontier
Against the frontier
- GPT-5.6 Luna (Medium) is off the frontier: at the same or lower cost, GPT-6 Luna (Medium) scores 29.90 for $31.2.
- Granite 4.2 30B is off the frontier: at the same or lower cost, MiMo-V2.6-Flash scores 37.90 for $110.
GPT-5.6 Luna (Medium)Granite 4.2 30BToday's Pareto frontierOpen-weights frontierEvery other model
Matchup
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Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/gpt-5-6-luna-medium/granite-4-2-30b · Markdown: /api/v1/compare/gpt-5-6-luna-medium/granite-4-2-30b?format=md · llms.txt · agent skill